Ive been working on that one -how did you come by those figures-
It seemed to me to be the only suitable pattern left over. But I couldn't create a proof to confirm it. So it's not certain.
None of the lines are consecutive 1,2,3,4, ....
It is not grouped as odds and evens
None of them appear to have a + - x / sequence or similar total.
They didn't fit as Fibonacci numbers
The clue meant that 5 was in the sequence.
However 5 cannot be the last digit, unless you 1,2,3,4,5 which is a direct sequence. Eliminated in step one.
The line below contains 1,2,4, Since the pattern show no duplicates in a three digit combo going down. I went with what would be next. 1,3,4
The next number would have to be 5 to complete the clue.
4,5,6 was also in the line below so 7 seemed appropriate.
It's not a proof. It's a bad guess. But I figured what the heck.